Fixed all unused-variable Clang warnings on Windows.

chrome/browser/ui/browser_focus_uitest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/format_macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/strings/stringprintf.h"
@@ skipping 37 matching lines @@
 // TODO(jcampan): http://crbug.com/23683 for linux.
 // TODO(suzhe): http://crbug.com/49737 for mac.
 #define MAYBE_TabsRememberFocusFindInPage DISABLED_TabsRememberFocusFindInPage
 #elif defined(OS_WIN)
 // Flaky, http://crbug.com/62537.
 #define MAYBE_TabsRememberFocusFindInPage DISABLED_TabsRememberFocusFindInPage
 #endif
 
 namespace {
 
+#if defined(OS_POSIX)
 // The delay waited in some cases where we don't have a notifications for an
 // action we take.
 const int kActionDelayMs = 500;
+#endif
 
 const char kSimplePage[] = "/focus/page_with_focus.html";
 const char kStealFocusPage[] = "/focus/page_steals_focus.html";
 const char kTypicalPage[] = "/focus/typical_page.html";
 
 class BrowserFocusTest : public InProcessBrowserTest {
  public:
    // InProcessBrowserTest overrides:
   void SetUpOnMainThread() override {
      ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
@@ skipping 628 matching lines @@
         content::NOTIFICATION_NAV_ENTRY_COMMITTED,
         content::NotificationService::AllSources());
     chrome::GoForward(browser(), CURRENT_TAB);
     forward_nav_observer.Wait();
   }
 
   EXPECT_FALSE(IsViewFocused(VIEW_ID_OMNIBOX));
 }
 
 }  // namespace